Upstream commit:
Date: Fri, 1 Jun 2018 18:25:29 +0800
expand: Ensure result is escaped in cvtnum
The minus sign generated from arithmetic expansion is currently
unquoted which causes anomalies when the result is used in where
the quoting matters.
This patch fixes it by explicitly calling memtodest on the result
in cvtnum.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This wasn't an ash bug in dollar_altvalue9, it was hush bug (and bash!)
function old new delta
expand_one_var 2236 2254 +18
expand_vars_to_list 1097 1103 +6
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 2/0 up/down: 24/0) Total: 24 bytes
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
ash might be a bit buggy, need to investigate dollar_altvalue9 test
function old new delta
expand_one_var 1639 2236 +597
expand_variables 112 128 +16
expand_vars_to_list 1117 1097 -20
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 2/1 up/down: 613/-20) Total: 593 bytes
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
Upstream email:
parser: Fix parameter expansion inside inner double quotes
The parsing of parameter expansion inside inner double quotes
breaks because we never look for ENDVAR while innerdq is true.
echo "${x#"${x+''}"''}
This patch fixes it by pushing the syntax stack if innerdq is
true and we enter a new parameter expansion.
This patch also fixes a corner case where a bad substitution error
occurs within arithmetic expansion.
Reported-by: Denys Vlasenko <vda.linux@googlemail.com>
Fixes: ab1cecb40478 (" parser: Add syntax stack for recursive...")
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
function old new delta
readtoken1 2880 2898 +18
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This closes 10821.
Upstream patch:
From: Herbert Xu <herbert@gondor.apana.org.au>
Date: Fri, 9 Mar 2018 00:14:02 +0800
parser: Add syntax stack for recursive parsing
Without a stack of syntaxes we cannot correctly these two cases
together:
"${a#'$$'}"
"${a#"${b-'$$'}"}"
A recursive parser also helps in some other corner cases such
as nested arithmetic expansion with paratheses.
This patch adds a syntax stack allocated from the stack using
alloca. As a side-effect this allows us to remove the naked
backslashes for patterns within double-quotes, which means that
EXP_QPAT also has to go.
This patch also fixes removes any backslashes that precede right
braces when they are present within a parameter expansion context,
and backslashes that precede double quotes within inner double
quotes inside a parameter expansion in a here-document context.
The idea of a recursive parser is based on a patch by Harald van
Dijk.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
var_bash3, var_bash4 and var_bash6 tests are updated
with the output given by bash-4.3.43
With this patch, the following tests now pass for ash:
dollar_repl_slash_bash2.tests
squote_in_varexp2.tests
squote_in_varexp.tests
var_bash4.tests
function old new delta
readtoken1 2615 2874 +259
synstack_push - 54 +54
evalvar 574 571 -3
rmescapes 330 310 -20
subevalvar 1279 1258 -21
argstr 1146 1107 -39
------------------------------------------------------------------------------
(add/remove: 1/0 grow/shrink: 1/4 up/down: 313/-83) Total: 230 bytes
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
It turns out bkslash_in_varexp.tests was a bash bug :]
ash and hush fail "corrected" bkslash_in_varexp.tests as well,
just not as badly as I thought (hush gets half of the cases right).
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
Bash doesn't expand its $'...' construct in double quotes:
$ echo "$'a\tb'"
$'a\tb'
Change BusyBox ash to do the same. This also fixes a problem with
here documents where BusyBox ash gave an incorrect result for:
$ cat <<EOF
> '$'
> EOF
'$'
Reported-by: Timo Teras <timo.teras@iki.fi>
Signed-off-by: Ron Yorston <rmy@pobox.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
